40368363640 has 96 divisors (see below), whose sum is σ = 100753884000. Its totient is φ = 14544541440.

The previous prime is 40368363619. The next prime is 40368363647. The reversal of 40368363640 is 4636386304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40368363647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489301 + ... + 565819.

It is an arithmetic number, because the mean of its divisors is an integer number (1049519625).

Almost surely, 2^40368363640 is an apocalyptic number.

40368363640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40368363640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50376942000).

40368363640 is an abundant number, since it is smaller than the sum of its proper divisors (60385520360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40368363640 is a wasteful number, since it uses less digits than its factorization.

40368363640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76661 (or 76646 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 40368363640 in words is "forty billion, three hundred sixty-eight million, three hundred sixty-three thousand, six hundred forty".